Classifications

• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
  • C08J5/18—Manufacture of films or sheets
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B27/00—Layered products comprising a layer of synthetic resin
  • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
  • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B27/00—Layered products comprising a layer of synthetic resin
  • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
  • B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
  • B65D65/38—Packaging materials of special type or form
  • B65D65/40—Applications of laminates for particular packaging purposes
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
  • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
  • C08L23/04—Homopolymers or copolymers of ethene
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
  • C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
  • C08J2323/04—Homopolymers or copolymers of ethene

Definitions

• the present invention relates to a polyethylene-based resin film, and a laminate and a package using the same.
• films have the advantages of being lightweight, easy to dispose of, and low cost.
• the sealant film is generally used by laminating with a base film such as a biaxially stretched nylon film, a biaxially stretched ester film, or a biaxially stretched polypropylene film, which is inferior in low temperature thermal adhesion to the sealant film. .. If these base films are stored in a roll after laminating, blocking may occur between the sealant film and the base film, making it difficult to rewind the laminated film before bag making, or bag making. Blocking occurred between the sealant films on the inner surface of the bag being processed, which sometimes made it difficult to fill the food. Therefore, a method is known in which powder such as starch is sprinkled on the surface of the sealant film to avoid blocking between the sealant film and the base material and blocking between the sealant films as described above.
• a base film such as a biaxially stretched nylon film, a biaxially stretched ester film, or a biaxially stretched polypropylene film, which is inferior in low temperature thermal adhesion to the sealant film. .. If these base
• the present invention has at least one layer A made of a polyethylene-based resin composition, the polyethylene-based resin composition constituting the layer A satisfies the following 1) to 3), and at least one of the layers A. It is a polyethylene-based resin film whose surface satisfies both of the following 4) and 5).
• 1) Contains a polyethylene resin having a density of 900 kg / m 3 or more and 935 kg / m 3 or less.
• 2) Contains particles made of polyethylene resin.
• the content of the organic machine lubricant is 0.16% by weight or more.
• the three-dimensional surface roughness SRa is 0.05 to 0.2 ⁇ m.
• the maximum mountain height SRmax is 2 to 15 ⁇ m.
• the polyethylene-based resin composition having at least one layer A made of the polyethylene-based resin composition and constituting the layer A satisfies the following 1) to 3), and at least the said layer A.
• One surface is a polyethylene-based resin film that satisfies both 4) and 5) below.
• the density is 900 kg / m 3 or more and 935 kg / m 3 or less.
• 2) Contains particles made of polyethylene resin.
• the content of the organic machine lubricant is 0.16% by weight or more.
• the three-dimensional surface roughness SRa is 0.05 to 0.2 ⁇ m. 5)
• the maximum mountain height SRmax is 2 to 15 ⁇ m.
• the resin hardness of the particles made of the polyethylene-based resin is D70 or less.
• the average particle size of the particles made of the polyethylene resin is 5 to 15 ⁇ m.
• the content of the particles made of the polyethylene-based resin in the polyethylene-based resin composition constituting the layer A is preferably 0.2 to 2.0% by weight.
• the blocking value between the A layer surfaces is 200 mN / 70 mm or less.
• the surfaces of the A layer are set in a Gakushin type wear tester manufactured by Yasuda Seiki, and the amount of change in haze after 100 times of wear with a load of 200 g is 5% or less. ..
• a laminate containing the polyethylene-based resin film described in any of the above and a base film composed of the composition is suitable.
• a packaging bag containing the laminate is suitable.
• the present invention can provide a polyethylene-based resin film having excellent appearance, heat-sealing property, stable blocking resistance, stable slipperiness, and particularly excellent scratch resistance. Further, it is possible to provide a laminate using this polyethylene-based resin film and a package.
• the layer A in the present invention is made of a polyethylene-based resin composition, and the polyethylene-based resin composition mainly contains a polyethylene-based resin and also contains particles made of a polyethylene-based resin.
• the polyethylene-based resin composition preferably contains a polyethylene-based resin in an amount of 50% by weight or more, more preferably 70% by weight, and even more preferably 90% by weight or more.
• the polyethylene-based resin in the present invention is either a homopolymer of an ethylene monomer, a copolymer of an ethylene monomer and an ⁇ -olefin, or a mixture thereof, and the ⁇ -olefin includes propylene and butene-. 1. Hexene-1, 4-methylpentene-1, octene-1, decene-1, and the like can be mentioned.
• Density range of the polyethylene resin is more preferably 900 ⁇ 935kg / m 3, more preferably 910 ⁇ 933kg / m 3, particularly preferably 910 ⁇ 930kg / m 3.
• a polyethylene resin having a density of 935 kg / m 3 or less does not have a high heat sealing start temperature, is easy to bag, and has excellent transparency. More importantly, when a polyethylene resin having a density of 935 kg / m 3 or less is used, the three-dimensional surface roughness SRa of at least one surface of the layer A is 0.05 ⁇ m or more due to the particles made of the polyethylene resin.
• the maximum mountain height SRmax can be easily increased by 2 ⁇ m, and the polyethylene-based resin film can easily obtain slipperiness, blocking resistance, and scratch resistance. Therefore, wrinkles and bumps occur in coating processing, printing processing, and bag making processing.
• the present inventors have found that it is less likely to occur and that transparency is easily maintained.
• the blocking resistance is stable because it does not easily fluctuate with each measured value of the four measurements.
• the three-dimensional surface roughness SRa of at least one surface of the A layer is 0.2 ⁇ m or less and the maximum mountain height SRmax is increased by the particles made of the polyethylene resin. It is easy to control to 15 ⁇ m or less, and it is easy to improve transparency and waist.
• a sample in which the A-layer surfaces of the film are overlapped is subjected to a heat press (tester industry, model: SA-303) in a size of 7 cm x 7 cm, a temperature of 50 ° C., a pressure of 18 MPa, and a time of 15 minutes. Perform pressure treatment.
• the sample and bar (diameter 6 mm, material: aluminum) blocked by this pressure treatment were attached to the autograph (Shimadzu model: UA-3122) so that the bar and the peeling surface were horizontal, and the bar was speeded (200 m).
• the force at which the blocking part is peeled off is measured four times at (/ min), and the average value is used as an index.
• the reason why the measured value does not easily fluctuate for each measurement sample is that when polyethylene having a density of 935 kg / m 3 or less and particles made of polyethylene resin are melt-mixed, the viscosity average molecular weight of the particles made of polyethylene resin decreases and polyethylene It is presumed that changes in particle size due to entanglement of molecular chains with polyethylene-based resins other than particles made of based resin are unlikely to occur, and as a result, the surface protrusions formed become uniform.
• Scratch resistance was judged by the amount of change in haze after 100 times of abrasion with a load of 200 g by setting the surfaces of the A layer of the polyethylene resin film on the Gakushin type abrasion tester manufactured by Yasuda Seiki.
• the melt flow rate (hereinafter, may be referred to as MFR) is preferably about 2.5 to 4.5 g / min from the viewpoint of film forming property and the like.
• MFR was measured according to ASTM D1893-67.
• the polyethylene-based resin is synthesized by a method known per se.
• the polyethylene-based resin preferably has a melting point of 85 ° C. or higher, more preferably 100 ° C. or higher, and particularly preferably 110 ° C. or higher.
• the polyethylene-based resin may be a single type, but two or more types of polyethylene resins having different densities in the above density range may be blended. When two or more types of polyethylene resins having different densities are blended, the average density and blending ratio can be estimated by GPC measurement or density measurement.
• the high-pressure low-density polyethylene (LDPE), Buten-1 which is transparent, has high flexibility, and has excellent tear strength and tensile strength on average.
• LLDPE Metallocene-catalyzed linear short-chain branched polyethylene
• a commercially available product can also be used.
• the particles made of the polyethylene resin contained in the polyethylene resin composition constituting the layer A preferably have a viscosity average molecular weight of 1.5 million or more, more preferably 1.6 million or more, still more preferably 1.7 million or more. .. Further, it is preferably 2.5 million or less, more preferably 2.4 million or less, and further preferably 2.3 million or less. If the viscosity average molecular weight of the particles made of polyethylene-based resin is within this range, the average particle size of the particles made of polyethylene-based resin can be controlled, and when used in combination with a polyethylene-based resin having a specific density, at least layer A can be controlled.
• the three-dimensional surface roughness SRa of one surface can be 0.05 to 0.2 ⁇ m, and the maximum mountain height SRmax can be 2 to 15 ⁇ m.
• the reason is that the difference in molecular weight between the particles made of the polyethylene resin and the polyethylene resin other than the particles made of the polyethylene resin is very large, so that the molecules are not sufficiently mixed, and the film is melt-mixed and extruded.
• the temperature at the time of melt mixing with the polyethylene resin other than the particles made of polyethylene resin is larger than the melting point peak of the particles made of polyethylene resin. Even under the conditions of shearing by the extruder and film forming conditions with a high draft ratio, decomposition due to heat or shearing, fusion and aggregation of particles made of polyethylene resin, and polyethylene resin other than particles made of polyethylene resin. Since the grain diameter and shape of the polyethylene resin particles are less likely to change due to partial compatibility, it becomes easier to form controlled protrusions of the shape such as inorganic particles and organic crosslinked resin particles, and anti-blocking.
• the polyethylene resin near the film surface has the property that particles made of a polyethylene resin having a viscosity average molecular weight of 1.5 million or more do not easily aggregate in the polyethylene resin. It was found that it has a feature that inorganic particles and organic crosslinked resin particles do not have, that is, it does not easily fall off from polyethylene.
• the viscosity average molecular weight When the viscosity average molecular weight is 1.5 million to 2.5 million, it becomes easy to set the average particle size to 5 to 20 ⁇ m, and when the seal layer raw materials are melt-mixed to form an extruded film, suitable film surface protrusions are formed. It tends to be easier to form. Further, when the viscosity average molecular weight of the particles made of polyethylene resin is 1.5 million or more, the particles themselves have lubricity and contribute to improvement of blocking resistance and slipperiness, and since the particles made of polyethylene resin are soft, they are scratch resistant. It is thought that the sex will also improve.
• the resin hardness of the particles made of polyethylene-based resin is preferably D70 or less. When the hardness is 70 or less, defects are less likely to occur in the laminated layer of the film, for example, the vapor-deposited layer, and the barrier property is less likely to be lowered.
• the hardness is more preferably D68 or less. Further, when the hardness of the particles made of the polyethylene resin is D60 or more, the slipperiness is improved, and the slipperiness is less likely to deteriorate even if heat is received during film processing.
• the particles made of a polyethylene-based resin are a homopolymer of an ethylene monomer, a copolymer of an ethylene monomer and an ⁇ -olefin, and a mixture thereof, and the ⁇ -olefins include propylene and butene-1.
• the ⁇ -olefins include propylene and butene-1.
• Hexene-1, 4-methylpentene-1, octene-1, decene-1, and the like can be exemplified.
• Density range of particles consisting of polyethylene-based resin is preferably 930 ⁇ 950kg / m 3, more preferably 935 ⁇ 945kg / m 3, more preferably 937 ⁇ 942kg / m 3.
• the particles made of polyethylene resin having a density of less than 930 kg / m 3 are soft, and it is difficult to maintain the shape of the particles during melt extrusion, and the blocking resistance tends to decrease. Further, the particles made of polyethylene resin having a density of more than 950 kg / m 3 are not only hard and the scratch resistance is likely to be lowered, but also the affinity with the base polyethylene resin is lowered, so that the drop resistance is lowered. there is a possibility.
• the average particle size of the particles made of the polyethylene-based resin contained in the polyethylene-based resin composition constituting the layer A is preferably 5 ⁇ m or more, more preferably 6 ⁇ m or more, still more preferably 7 ⁇ m or more.
• the average particle size is preferably 20 ⁇ m or less, more preferably 17 ⁇ m or less, and particularly preferably 15 ⁇ m or less. In addition, it preferably does not contain particles having a particle size of 30 ⁇ m or more. Even if the average particle size is 20 ⁇ m or less, if a predetermined amount of 10% or more of particles having a particle size of 30 ⁇ m or more is contained, the maximum peak height of the film surface tends to exceed 15 ⁇ m. Then, when the film surface is visually inspected, flicker described later occurs. Occur. Further, particles having a size of 30 ⁇ m or more are not preferable in that they have the same appearance as gel-like defects and the quality is deteriorated.
• the average particle size of the particles made of polyethylene resin By setting the average particle size of the particles made of polyethylene resin to 5 ⁇ m or more, slipperiness and blocking resistance can be improved. Further, when the average particle size is 20 ⁇ m or less, the three-dimensional surface roughness SRa and the maximum protrusion height SRmax of at least one surface of the A layer do not become too large, and particles made of polyethylene resin having the same weight are added. Since the number of protrusions increases, it is easy to obtain slipperiness, blocking resistance, and scratch resistance sufficient for film processing.
• the average particle size of the particles made of polyethylene resin is less likely to change due to crushing and agglomeration due to kneading during extrusion than relatively soft inorganic particles such as talc and calcium carbonate, and the average particle size (before and after extrusion) is controlled. It is easy to remove, and by setting the average particle size of the particles made of polyethylene resin in the range of 5 to 20 ⁇ m, protrusions due to coarse particles are almost eliminated, and the hardness of the protrusions themselves is lower than that of inorganic particles. The adverse effect on the coat provided on the other surface or a layer different from the A layer is suppressed.
• the content of the particles made of the polyethylene resin in the polyethylene resin composition constituting the layer A is preferably 0.2% by weight or more, preferably 0.3% by weight or more, based on the polyethylene resin composition. More preferably, 0.4% by weight or more is further preferable. Further, 2.0% by weight or less is preferable, 1.5% by weight or less is more preferable, and 1.0% by weight or less is further preferable.
• the amount of particles made of polyethylene resin added is 0.2% by weight or more, it becomes easy to set the maximum mountain height of at least one of the A layer surfaces to 2 ⁇ m or more per specified area (0.2 mm 2 ), and blocking resistance. And slipperiness can be easily obtained. Further, when the addition amount of the particles made of the polyethylene resin is 2.0% by weight or less, the protrusions on the surface of the A layer do not become too large, and the transparency and the low temperature sealing property are easily improved.
• the polyethylene-based resin composition constituting the A layer contains an organic machine-based lubricant.
• the slipperiness and blocking resistance of the film are improved, and the handleability of the film is improved. It is considered that the reason is that the organic lubricant bleeds out and exists on the film surface, so that the lubricant effect and the mold release effect are exhibited. Further, it is preferable to add an organic lubricant having a melting point of room temperature or higher.
• organic lubricants include fatty acid amides and fatty acid esters.
• oleic acid amide examples thereof include oleic acid amide, erucic acid amide, behenic acid amide, ethylene bisoleic acid amide, hexamethylene bisoleic acid amide, and ethylene bisstearic acid amide. These may be used alone, but it is preferable to use two or more of them in combination because the slipperiness and the blocking prevention effect can be maintained even in a harsh environment.
• the lower limit of the content of the organic lubricant in the polyethylene resin composition constituting the layer A is preferably 0.16% by weight or more, preferably 0.18% by weight, and more preferably 0.19% by weight. It is particularly preferably 0.21% by weight. When it is 0.16% by weight or more, the slipperiness tends to be stable immediately after the film formation.
• the upper limit is preferably 0.3% by weight, more preferably 0.25% by weight. If it is 0.3% by weight or less, it does not slip too much and does not easily whiten over time.
• the average particle size is sufficiently smaller than the average particle size of the particles made of the polyethylene resin. It is preferable that the average particle size of the inorganic particles is 50% or less of the average particle size of the particles made of the polyethylene resin and does not contain coarse particles that are twice or more the average particle size.
• the content of the inorganic particles is preferably 0.20% by weight or less, more preferably 0.10% by weight or less, and 0.05% by weight or less. More preferably, 0% by weight is most preferable.
• the content of the inorganic particles By setting the content of the inorganic particles to 0.20% by weight or less, not only the residue at the time of incineration is reduced, but also the effect similar to the case of adding only the particles made of polyethylene resin such as scratch resistance and the particles not falling off is obtained. It will be easier to obtain.
• the inorganic particles referred to here are inorganic substances generally used as anti-blocking agents such as silica, talc, calcium carbonate, diatomaceous earth, and zeolite.
• the average particle size is sufficiently smaller than the average particle size of the particles made of the polyethylene resin. It is preferable that the average particle size of the crosslinked organic particles is 50% or less of the average particle size of the particles made of the polyethylene resin and hardly contains coarse particles that are twice or more the average particle size. It is preferable that the content of the crosslinked organic particles in the polyethylene-based resin composition constituting the layer A is equal to or less than the amount of the particles made of the polyethylene-based resin from the viewpoint of suppressing the dyeing of the die and cost.
• the polyethylene-based resin composition constituting the A layer does not contain crosslinked organic particles in order to obtain the effects of adding particles made of polyethylene resin such as scratch resistance and particles not falling off. Is most preferable.
• the crosslinked organic particles referred to here are organic crosslinked particles typified by a polymethylacrylate resin or the like.
• Density range of the polyethylene resin composition that constitutes the A layer is preferably 900 ⁇ 935kg / m 3, more preferably 910 ⁇ 933kg / m 3, more preferably 910 ⁇ 930kg / m 3, is 915 ⁇ 928kg / m 3 It is particularly preferable, and 915 to 925 kg / m 3 is particularly preferable.
• Polyethylene resins having a density of less than 900 kg / m 3 tend to have reduced blocking resistance.
• the polyethylene-based resin composition having a density of 935 kg / m 3 or less does not have a high heat-sealing start temperature, is easy to bag-make, and has excellent transparency.
• the polyethylene resin multilayer film tends to obtain stable blocking resistance or stable slipperiness, and the polyethylene resin constituting the A layer is easily obtained.
• the present inventors have found that the organic machine-based lubricant contained in the composition and the surface protrusions composed of polyethylene-based resin particles have an extremely excellent scratch resistance due to the synergistic effect.
• the melt flow rate (hereinafter, may be referred to as MFR) is preferably about 2.5 to 4.5 g / min from the viewpoint of film forming property and the like.
• the MFR was measured according to ASTM D1893-67.
• the polyethylene-based resin film of the present invention may have a multilayer structure.
• one layer or two or more layers can be provided in addition to the A layer.
• a general multi-layer device multi-layer feed block, static mixer, multi-layer multi-manifold, etc.
• a method of laminating thermoplastic resins fed from different flow paths using two or more extruders in multiple layers using a field block, a static mixer, a multi-manifold die, or the like can be used. It is also possible to introduce the above-mentioned multi-layer device into the melt line from the extruder to the T-type die by using only one extruder.
• the other layers should be an intermediate layer (B layer) and a laminated layer (C layer), respectively, and should be included in this order.
• the outermost layers in this case are A layer and C layer, respectively.
• Examples of the polyethylene-based resin used in the intermediate layer (B layer) and the laminated layer (C layer) include one or a mixture of two or more selected from ethylene / ⁇ -olefin copolymer and high-pressure polyethylene. ..
• the ethylene / ⁇ -olefin copolymer is a copolymer of ethylene and an ⁇ -olefin having 4 to 18 carbon atoms, and the ⁇ -olefins include butene-1, hexene-1, 4-methylpentene-1, and the like. Examples thereof include octene-1 and desen-1.
• the film obtained from these polyethylene-based resins has excellent heat-sealing strength, hot-tacking property, contaminant sealing property, and impact resistance, and the polyethylene-based resin has other properties as long as it does not impair these properties.
• a resin for example, an ethylene / vinyl acetate copolymer, an ethylene / acrylic ester copolymer, or the like may be mixed and used.
• the polyethylene-based resins used for the intermediate layer (B layer) and the laminate layer (C layer) may be the same or different.
• particles made of polyethylene resin may or may not be added, but if particles having a large particle diameter such as coarse particles are present in the laminate layer, laminar floating is likely to occur, so those who do not add them. Is preferable.
• the average density of the polyethylene resin compositions constituting each layer of the film is A layer ⁇ intermediate layer (B layer) ⁇ laminated layer (C layer). Since the blended organic lubricant does not easily move to a dense layer, it is effective in maintaining the slipperiness of the A layer after laminating and maintaining the laminating strength over time.
• the lower limit of the density of the polyethylene resin composition constituting the intermediate layer (B layer) is preferably 900 kg / m 3 , more preferably 920 kg / m 3 , and further preferably 930 kg / m 3 . If it is less than the above, the waist is weak and it may be difficult to process.
• the upper limit of the density of the intermediate layer (layer B) is preferably 960 kg / m 3 , more preferably 940 kg / m 3 , and even more preferably 935 kg / m 3 .
• the above-mentioned organic machine-based lubricant may be contained in the polyethylene-based resin composition constituting the intermediate layer (B layer) of the polyethylene-based resin film of the present invention, and the lower limit of the organic machine-based lubricant is preferably 100 ppm. .. If it is less than the above, slipperiness may deteriorate.
• the upper limit of the organic machine lubricant in the polyethylene resin composition constituting the intermediate layer is preferably 2000 ppm, more preferably 1500 ppm. If it exceeds the above, it may slip too much and cause miswinding or whitening over time.
• the intermediate layer (B layer) of the film of the present invention may be blended to the extent that the quality of the recovered resin is not impaired.
• an active ray treatment such as a corona treatment on the laminated layer (C layer) surface of the polyethylene-based resin film described above.
• the correspondence improves the laminate strength.
• the polyethylene-based resin film of the present invention has two layers, it is preferable to use the A layer as a sealing layer and the other layer as a laminating layer (C layer).
• the three-dimensional surface roughness SRa of the seal layer of the polyethylene-based resin multilayer film of the present invention is preferably 0.05 ⁇ m or more. When SRa is 0.05 ⁇ m or more, slipperiness and blocking resistance are excellent. SRa is more preferably 0.07 ⁇ m or more, and particularly preferably 0.1 ⁇ m or more. The three-dimensional surface roughness SRa of the seal layer of the polyethylene-based resin multilayer film of the present invention is preferably 0.2 ⁇ m or less. When SRa is 0.2 ⁇ m or less, the transparency is unlikely to decrease. The SRa is more preferably 0.18 ⁇ m or less, and particularly preferably 0.16 ⁇ m or less.
• the measuring method is the method described in Examples. (Maximum protrusion height SRmax) It is necessary that the maximum protrusion height of at least one surface of the A layer of the polyethylene-based resin film of the present invention is 2 ⁇ m or more and 15 ⁇ m or less. If the maximum protrusion height SRmax exceeds 15 ⁇ m, appearance defects will occur, which is not preferable.
• the measuring method is the method described in Examples.
• the upper limit of the heat seal start temperature of the polyethylene-based resin film of the laminated body obtained by laminating the biaxially stretched nylon film (15 ⁇ m) and the polyethylene-based resin film is preferably 140 ° C., more preferably 130 ° C. If it exceeds the above, it may be difficult to process the seal.
• the lower limit of the reached heat seal strength at 150 ° C. of the polyethylene resin film of the laminate obtained by laminating the biaxially stretched nylon film (15 ⁇ m) and the polyethylene resin film is preferably 30 N / 15 mm, more preferably 35 N / 15 mm. .. If it is less than the above, the bag may be easily torn after the bag is made. It is preferable that the upper limit of the heat seal strength of the polyethylene resin film of the laminated body obtained by laminating the biaxially stretched nylon film (15 ⁇ m) and the polyethylene resin film at 150 ° C. is substantially the same as the breaking strength of the laminated nylon. When it is equivalent to the breaking strength of nylon, it means that the laminating strength is sufficiently high and the peeling strength at the sealing interface is sufficiently high.
• the measuring method is the method described in Examples.
• Blocking strength The smaller the blocking strength of the polyethylene-based resin film of the laminate obtained by laminating the biaxially stretched nylon film (15 ⁇ m) and the polyethylene-based resin film, the more preferably, more preferably 200 mN / 70 mm or less, and further preferably 150 mN / 70 mm. If it exceeds the above, the non-powder property and the mouth opening property of the bag-making product cannot be sufficiently obtained.
• the measuring method is the method described in Examples.
• the lower limit of the coefficient of static friction of the polyethylene-based resin film of the laminate obtained by laminating the biaxially stretched nylon film (15 ⁇ m) and the polyethylene-based resin film is preferably 0.05, more preferably 0.08. If it is less than the above, the film may slip too much during winding and cause winding misalignment.
• the upper limit of the coefficient of static friction after laminating is preferably 0.70, more preferably 0.5. If it exceeds the above, the opening property after bag making and the filling property of the contents are poor, and the loss during processing may increase.
• the measuring method is the method described in Examples.
• the lower limit of the haze of the polyethylene-based resin film of the present invention is preferably 3%, more preferably 4%, and even more preferably 5%. If it is less than the above, the anti-blocking agent may not be sufficiently present on the surface, which may cause blocking.
• the upper limit of haze is preferably 18%, more preferably 16%, and even more preferably 13%. If it exceeds the above, it may be difficult to visually recognize the contents.
• the measuring method is the method described in Examples.
• the polyethylene-based resin film of the present invention hardly feels flicker, or has fine flicker but is uniform and is not particularly noticeable.
• the measuring method is the method described in Examples.
• the so-called non-powder type which has blocking resistance without sprinkling powder such as starch on the film surface, has conventionally added inorganic particles having an average particle size of about 10 ⁇ m, but may contain coarse particles. Many flicker and transparency tend to be inferior.
• the laminate obtained by laminating a biaxially stretched nylon film (15 ⁇ m) and a polyethylene-based resin film preferably has a haze change of 3% or less, preferably 2% or less, even after rubbing the polyethylene-based resin film surfaces so as to overlap each other. More preferably, 1% or less is further preferable, and 0.5% or less is particularly preferable.
• the measuring method is the method described in Examples.
• the so-called non-powder type which has blocking resistance without sprinkling powder such as starch on the film surface, has conventionally added inorganic particles having an average particle size of about 10 ⁇ m, but the inorganic particles are more than polyethylene resin. Since it is much harder, scratch resistance tends to be inferior even if sufficient organic machine lubricant is present on the film surface.
• the lower limit of Young's modulus (MD) of the polyethylene-based resin film of the present invention is preferably 60 MPa, more preferably 70 MPa. If it is less than the above, the waist may be too weak and it may be difficult to process.
• the upper limit of Young's modulus (MD) is preferably 600 MPa, more preferably 500 MPa.
• the lower limit of Young's modulus (TD) of the polyethylene-based resin film of the present invention is preferably 60 MPa, more preferably 70 MPa. If it is less than the above, the waist may be too weak and it may be difficult to process.
• the upper limit of Young's modulus (TD) is preferably 600 MPa, more preferably 500 MPa.
• the base film is not particularly limited, but is not particularly limited, such as a polyolefin film such as polyethylene or polypropylene, a styrene resin film, a polyester film such as polyethylene terephthalate or polybutylene terephthalate, and nylon 6 or nylon 6,6.
• Polycarbonate film, or stretched film of these, laminated film of polyolefin film and resin film with gas barrier property such as polyamide film or ethylene-vinyl alcohol copolymer film, and metal foil such as aluminum if necessary.
• a vapor-deposited film or paper on which aluminum, silica or the like is vapor-deposited is appropriately selected and used according to the purpose of use of the laminate.
• This base film can be used not only by one type but also by laminating two or more types in combination.
• the base film is adjacent to the laminate layer side of the polyethylene resin multilayer film.
• the composition may be a polyethylene-based resin multilayer film / adhesive layer / other base film.
• an anchor coating agent such as urethane-based or isocyanate-based adhesive is used as the adhesive layer, or a modified polyolefin such as unsaturated carboxylic acid graft polyolefin is used as the adhesive resin, the adjacent layers can be firmly bonded. it can.
• the thickness of the laminated body is not particularly limited, but is preferably 10 to 200 ⁇ m when the laminated body is used as a film such as a lid material, and preferably 200 to 1000 ⁇ m when used as a cup or tray sheet.
• the sealant layer surfaces of the sealant film of the laminate are opposed to each other, or the seal layer surfaces of the sealant film layer of the laminate are opposed to another base film, and then the desired container shape is formed from the laminate layer side.
• a container can be manufactured by heat-sealing at least a part of the periphery thereof. Further, by heat-sealing the entire periphery, a sealed bag-shaped container can be manufactured. Combining this bag-shaped container molding process with the content filling process, that is, the bottom and sides of the bag-shaped container are heat-sealed, the contents are filled, and then the top is heat-sealed to manufacture the package. can do. Therefore, this laminate can be used in an automatic packaging device for solids, powders, or liquid materials such as snack foods.
• the contents are filled in a container formed into a cup shape by vacuum molding or pressure molding, a container obtained by injection molding or blow molding, a container formed from a paper base material, or the like, and then the laminate of the present invention is used.
• a container in which the contents are packaged can also be obtained by coating as a lid material and heat-sealing.
• Average particle size of particles made of polyethylene resin The average particle size of the polyethylene resin particles before use was measured as follows. Particles are dispersed in ion-exchanged water stirred at a predetermined rotation speed (about 5000 rpm) using a high-speed stirrer, the dispersion is added to isoton (physiological saline), further dispersed by an ultrasonic disperser, and then called. The particle size distribution was obtained by the counter method and calculated as the average particle size.
• the raw materials before film molding were measured by the following methods.
• the polyethylene-based resin that forms the layer containing particles made of polyethylene-based resin is a single layer, all layers, and if it is laminated, the layer structure is confirmed with an electron microscope, etc., and then the surface is scraped off to a thickness less than the surface layer.
• the same measurement can be performed with the filtered solution obtained in (1) above from which the solvent has been removed.
• scraping from the lamination it can be done by laminating on a PET film or the like and then scraping off the surface layer with a razor or the like.
• melting point Using a differential scanning calorimeter (DSC) manufactured by SII, the measurement was performed at a sample amount of 10 mg and a heating rate of 10 ° C./min. The melting endothermic peak temperature detected here was taken as the melting point.
• DSC differential scanning calorimeter
• Content (% by weight) of inorganic particles in the resin composition The content of the inorganic particles in the resin composition was calculated from the amount added in the raw material resin composition before processing. Even after film molding, the inorganic particles are separated and measured by using decan as a solvent, dissolving the film at a temperature at which it completely dissolves, and filtering the residue with a filter with a filtration accuracy of 1 to 2 ⁇ m. It is also possible to do.
• Residual amount (ppm) after film incineration Weigh about 30 g of film with a precision balance to a small number of first digits (round to the second digit).
• the crucible is pre-baked at 700 ° C. for 1 hour, seasoned with a glass desiccator until the temperature reaches 100 ° C. or lower, and the weight of the crucible is measured. After that, put the film in the crucible and incinerate it in an electric furnace at 700 ° C for 2 hours. After turning off the heater, lower the temperature to about 100 ° C, transfer it to a glass desiccator, season it for 30 minutes until it reaches room temperature, and then the weight difference of the crucible before and after incineration. Was divided by the weight of the film to calculate the amount of residue.
• the prepared laminated sample was heat-sealed with a sealing pressure of 0.1 MPa, a sealing time of 0.5 seconds, and a sealing temperature of 90 to 160 ° C. at a pitch of 10 ° C. and a width of 10 mm.
• the heat-sealed sample is cut into strips so that the heat-sealing width is 15 mm, set on an autograph (Shimadzu Seisakusho model: UA-3122), and the maximum strength at which the sealed surface is peeled off at a speed of 200 mm / min.
• the value was measured with n number 3 and the heat seal strength and heat seal temperature at each temperature were plotted.
• the heat seal temperature of 4.9 N / 15 mm was read from the graph connecting each plot with a straight line and used as the heat seal start temperature.
• Toyo Morton's dry laminating adhesive (TM569, CAT-10L) was applied to the corona surface of a nylon film (Toyobo biaxially stretched nylon film: N1100, 15 ⁇ m) so that the solid content was 3 g / m 2, and the temperature was 80 ° C. After volatilizing and removing the solvent in the oven, the corona surface of the polyethylene resin film and the adhesive coated surface were niped and laminated on a temperature control roll at 60 ° C. The laminated laminated film was aged at 40 ° C. for 2 days.
• the prepared laminated sample was heat-sealed with a sealing pressure of 0.1 MPa, a sealing time of 0.5 seconds, and a sealing temperature of 120 to 190 ° C. at a pitch of 10 ° C. and a width of 10 mm.
• the heat-sealed sample is cut into strips so that the heat-sealing width is 15 mm, set on an autograph (Shimadzu Seisakusho model: UA-3122), and the maximum strength at which the sealed surface is peeled off at a speed of 200 mm / min.
• the value was measured with n number 3, and the heat seal strength having the highest average value was defined as the reached seal strength.
• Blocking strength (mN / 70 mm)
• a laminated film with a nylon film (Biaxially stretched nylon film manufactured by Toyobo: N1100, 15 ⁇ m) was prepared as follows. Toyo Morton's dry laminating adhesive (TM569, CAT-10L) is applied to the corona surface of the nylon film so that the solid content is 3 g / m 2 , and the solvent is volatilized and removed in an oven at 80 ° C. The corona surface of the film and the adhesive coated surface were niped and laminated on a temperature control roll at 60 ° C. The laminated laminated film was aged at 40 ° C. for 2 days.
• a sample (10 cm x 15 cm) in which the surfaces of the A layer are overlapped is placed 1 cm inside in the length direction (15 cm) at the center of the sample width (10 cm).
• a 7 cm ⁇ 7 cm aluminum plate (2 mm thick) is placed at the position so that the edges are aligned, and a pressure treatment is performed at a temperature of 50 ° C., a gauge pressure of 18 MPa, and a time of 15 minutes.
• Static friction coefficient A laminated film with a nylon film (Biaxially stretched nylon film manufactured by Toyobo: N1100, 15 ⁇ m) was prepared as follows. Toyo Morton's dry laminating adhesive (TM569, CAT-10L) is applied to the corona surface of the nylon film so that the solid content is 3 g / m 2 , and the solvent is volatilized and removed in an oven at 80 ° C. The corona surface and the adhesive coated surface were nipped and laminated on a temperature control roll at 60 ° C. The laminated laminated film was aged at 40 ° C. for 2 days. The coefficient of static friction between the polyethylene-based resin film surfaces of the prepared laminated film was measured in an environment of 23 ° C. and 65% RH in accordance with JIS-K-7125.
• Haze Only polyethylene-based resin film was measured using a direct-reading haze meter manufactured by Toyo Seiki Seisakusho Co., Ltd. in accordance with JIS-K-7105. Haze (%) [Td (diffusion transmittance%) / Tt (total light transmittance%)] x 100
• a laminated film with a nylon film (Biaxially stretched nylon film manufactured by Toyobo: N1100, 15 ⁇ m) was prepared as follows. Toyo Morton's dry laminating adhesive (TM569, CAT-10L) is applied to the corona surface of the nylon film so that the solid content is 3 g / m 2 , and the solvent is volatilized and removed in an oven at 80 ° C. The corona surface of the film and the adhesive coated surface were niped and laminated on a temperature control roll at 60 ° C. The laminated laminated film was aged at 40 ° C. for 2 days.
• Toyo Morton's dry laminating adhesive TM569, CAT-10L
• the polyethylene-based resin films of the prepared laminated film were pinched with fingers so that the surfaces overlapped with each other, rubbed 10 times, visually observed, and the susceptibility to scratches was classified by the following ⁇ , ⁇ , ⁇ , and ⁇ .
• ⁇ Almost no scratches.
• ⁇ Fine streak-like scratches are made, but whitening does not occur.
• ⁇ Fine streak-like denseness and partial whitening are observed.
• X The rubbed part is almost whitened.
• Miperon PM200 was mixed with Sumikasen (registered trademark) EFV405 manufactured by Sumitomo Chemical Co., Ltd. to prepare a master batch (1) containing 15% by weight of Miperon PM200.
• Sumikasen (registered trademark) EFV405 manufactured by Sumitomo Chemical Co., Ltd. was mixed with Miperon XM221U to prepare a master batch (2) containing 15% by weight of Miperon XM221U.
• Sumikasen (registered trademark) EFV405 manufactured by Sumitomo Chemical Co., Ltd. Inc. Made, mixed with Daikalite WF, Grefco. Inc.
• a master batch (3) containing 20% by weight of Daikalite WF was prepared.
• Sumikasen (registered trademark) E FV402 manufactured by Sumitomo Chemical was mixed with erucic acid amide to prepare a master batch (5) containing 4% by weight of erucic acid amide.
• Sumitomo Chemical's Sumikasen (registered trademark) E FV402 was mixed with ethylene bisoleic acid amide to prepare a master batch (6) containing 2% by weight of ethylene bisoleic acid amide.
• Example 1 [Composition for seal layer] Ube-Maruzen Polyethylene Umerit (registered trademark) 0540F is 86.25% by weight, masterbatch (1) is 4% by weight, masterbatch (5) is 1.25% by weight, and masterbatch (6) is 8.5% by weight. A composition for a seal layer was prepared using a composition mixed so as to be by weight%. [Composition for laminate layer] A composition for a laminated layer was prepared using only FV402 manufactured by Sumitomo Chemical Co., Ltd. [Composition for intermediate layer] Composition for intermediate layer using a composition in which FV402 manufactured by Sumitomo Chemical Co., Ltd.
• the composition for the laminate layer, the composition for the intermediate layer, and the composition for the seal layer are processed in the order of the composition for the laminate layer, the composition for the intermediate layer, and the composition for the seal layer using an extruder having a T-die. It was melt-extruded at 240 ° C. so that the thickness ratio of the laminate layer, the intermediate layer, and the seal layer was 8:34: 8. Then, the surface of the laminated layer was subjected to a corona discharge treatment.
• the film was wound on a roll at a speed of 150 m / min to obtain a polyethylene-based resin multilayer film having a thickness of 50 ⁇ m and a wetting tension of the treated surface of 45 mN / m.
• Example 2 In the seal layer, Sumikasen (registered trademark) E FV402 manufactured by Sumitomo Chemical Co., Ltd. was 86% by weight, masterbatch (1) was 4% by weight, masterbatch (5) was 1.50% by weight, and masterbatch (6). Is mixed with 8.5% by weight, A polyethylene-based resin multilayer film and a vapor-deposited film were obtained in the same manner as in Example 1 except that the laminated layer was changed only to Sumikasen (registered trademark) E FV405 manufactured by Sumitomo Chemical Co., Ltd.
• Example 3 In the seal layer, Sumikasen (registered trademark) E FV405 manufactured by Sumitomo Chemical Co., Ltd. was 87.75% by weight, masterbatch (1) was 4% by weight, masterbatch (5) was 1.25% by weight, and masterbatch ( 6) was mixed with 7% by weight, and Sumikasen (registered trademark) E FV402 manufactured by Sumitomo Chemical Co., Ltd. was changed to Sumikasen (registered trademark) E FV405 manufactured by Sumitomo Chemical Co., Ltd. in the intermediate layer, and Sumikasen manufactured by Sumitomo Chemical Co., Ltd. in the laminate layer.
• a polyethylene-based resin multilayer film and a vapor-deposited film were obtained in the same manner as in Example 1 except that only E FV407 (registered trademark) was changed.
• Example 4 In the seal layer, Sumikasen (registered trademark) E FV405 manufactured by Sumitomo Chemical Co., Ltd. was 84.75% by weight, masterbatch (1) was 8% by weight, masterbatch (5) was 1.25% by weight, and masterbatch ( 6) was mixed with 6% by weight, and in the intermediate layer, Sumikasen (registered trademark) E FV402 manufactured by Sumitomo Chemical Co., Ltd. was changed to Sumikasen (registered trademark) E FV405 manufactured by Sumitomo Chemical Co., Ltd., and in the laminated layer, Sumikasen manufactured by Sumitomo Chemical Co., Ltd. A polyethylene-based resin multilayer film and a vapor-deposited film were obtained in the same manner as in Example 1 except that only E FV407 (registered trademark) was changed.
• E FV407 registered trademark
• Example 5 In the seal layer, Ube-Maruzen Polyethylene Umerit (registered trademark) 3540F is 86.75% by weight, masterbatch (1) is 4% by weight, masterbatch (5) is 1.75% by weight, and masterbatch ( 6) is mixed with 7.5% by weight,
• Sumitomo Chemical's Sumikasen (registered trademark) E FV402 was changed to Ube-Maruzen Polyethylene's Umerit (registered trademark) 3540F.
• a polyethylene-based resin multilayer film and a vapor-deposited film were obtained in the same manner as in Example 1 except that the laminated layer was changed to only Ube-Maruzen Polyethylene Umerit (registered trademark) 3540F.
• Example 6 In the seal layer, Sumikasen (registered trademark) E FV405 manufactured by Sumitomo Chemical Co., Ltd. was 86.75% by weight, masterbatch (1) was 4% by weight, masterbatch (3) was 0.5% by weight, and masterbatch ( 5) is mixed with 1.25% by weight and masterbatch (6) is mixed with 7.5% by weight, and in the intermediate layer, Sumikasen (registered trademark) E FV402 manufactured by Sumitomo Chemical Co., Ltd. is mixed with Sumikasen (registered trademark) manufactured by Sumitomo Chemical Co., Ltd.
• a polyethylene-based resin multilayer film and a vapor-deposited film were obtained in the same manner as in Example 1 except that the laminate layer was changed to E FV405 and only Sumikasen (registered trademark) E FV407 manufactured by Sumitomo Chemical Co., Ltd. was changed.
• Example 7 In the seal layer, Sumikasen (registered trademark) EFV405 manufactured by Sumitomo Chemical Co., Ltd. was 87.25% by weight, masterbatch (1) was 4% by weight, masterbatch (5) was 1.25% by weight, and masterbatch ( 6) was mixed with 7.5% by weight, and Sumikasen (registered trademark) E FV402 manufactured by Sumitomo Chemical Co., Ltd. was changed to Sumikasen (registered trademark) E FV405 manufactured by Sumitomo Chemical Co., Ltd. in the intermediate layer, and Sumitomo Chemical Co., Ltd. in the laminated layer.
• a polyethylene-based resin multilayer film and a vapor-deposited film were obtained in the same manner as in Example 1 except that only Sumikasen (registered trademark) E FV407 was changed.
• the polyethylene-based resin films obtained in Examples 1 to 7 contain almost no inorganic particles larger than the particle size of the polyethylene-based resin particles, they have excellent scratch resistance, low-temperature heat sealability, blocking resistance, and slippage. It was also excellent in sex and appearance. Moreover, the amount of residue during film incineration was extremely small, and there was almost no meshing or filter pressurization, resulting in excellent film-forming workability.
• a polyethylene-based resin multilayer film and a vapor-deposited film were obtained in the same manner as in Example 1 except that the laminate layer was changed to FV405 and only Sumikasen (registered trademark) E FV405 manufactured by Sumitomo Chemical Co., Ltd. was changed.
• the film obtained in Comparative Example 1 was excellent in blocking resistance and slipperiness, had a slight flicker feeling, had a large amount of inorganic residue after incineration, was particularly inferior in scratch resistance, and was slightly inferior in film forming workability. Met.
• a polyethylene-based resin multilayer film and a vapor-deposited film were obtained in the same manner as in Example 1 except that only Sumikasen (registered trademark) E FV405 was changed.
• the film obtained in Comparative Example 2 had a relatively small amount of residue and was excellent in flicker, but was inferior in blocking resistance, scratch resistance, and slipperiness.
• a polyethylene-based resin multilayer film and a vapor-deposited film were obtained in the same manner as in Example 1 except that the laminate layer was changed to E FV405 and only Sumikasen (registered trademark) E FV405 manufactured by Sumitomo Chemical Co., Ltd. was changed.
• the film obtained in Comparative Example 3 had a relatively small amount of residue and was slightly excellent in scratch resistance, but had few protrusions and was inferior in blocking resistance.
• the film obtained in Comparative Example 4 has a relatively small amount of residue and is excellent in scratch resistance, but the surface protrusions due to polyethylene-based particles are not stable due to the high resin density, and the blocking resistance and slipperiness are not sufficient and there are variations. It was a big one.
• a polyethylene-based resin multilayer film and a vapor-deposited film were obtained in the same manner as in Example 1 except that only Sumikasen (registered trademark) E FV407 was changed.
• the film obtained in Comparative Example 5 had a small amount of residue and was excellent in scratch resistance, but even if the amount added was large, the particle size was large, so that the protrusion density was low, and the blocking resistance and flicker feeling were inferior.
• the polyethylene-based resin film of the present invention has been described above based on a plurality of examples, but the present invention is not limited to the configurations described in the above examples, and the configurations described in the respective examples are appropriately combined. Etc., the configuration can be changed as appropriate without departing from the purpose.
• the polyethylene-based resin film described in the present invention is excellent in its properties, and therefore can be suitably used for a film having a wide range of applications such as food packaging.

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